When the recipients notification is enabled, I was very surprised to see that, if I send a virus over zimbra to an external recipient, the external recipient will get informed I sent him a virus too! Thats for sure not what most companies want, letting others know you have a infection problem in the own house ... ;)

Is there a way to disable those notifications for external recipients?
Of course the best way to deal with this specific issue and viruses in general, would be to reject mails containing a virus. I know postfix could do it, but how about zimbra?